Final answer:
The sum of 18 and 6√2 is 18 + 6√2.
Step-by-step explanation:
To find the sum of 18 and 6√2, simply add the two numbers together. The sum is 18 + 6√2. Since the two terms are not like terms, they cannot be combined. Therefore, the sum of 18 and 6√2 is 18 + 6√2.
Learn more about Addition of Numbers